Network and Internet problems

I have a problem with the internet connection, my english is not very good so
i'm giving a link
http://www.tabletquestions.com/windo...nity-help.html

and if you can't open the link here is the important thing:
"My computer can browse the internet for awhile and then suddenly I can no
longer view any web pages despite the fact that the computer still shows I am
connected to our network and internet. The only way I am able to regain
access to the web is by RESTARTING my computer. I seem to be able to browse
for shorter and shorter periods, but still no apparent rhyme or reason. He
NEVER has any connection issues on his end. I have spent hours upon hours
with my ISP, Lynksys and HP customer services to no avail. I've adjusted as
many security, connection, network, firewall, program, etc settings that I
dare to pretend to understand and still nothing works. I am truly out of
patience and ideas."

My problem is exactly the same, i can view web pages for a some period of
time and then the problem is the same, it shows that i'm connected but there
is no internet. When i restart the PC i have internet for another period of
time...

Can you give me a simple fix for this, or just a simple answer - is there
any way to fix this yes or no?
Thank you!